Insert the Windows Server 2003 product CD, or, if you have installed or upgraded Windows Server 2003 using the Windows Server ...

Insert the Windows Server 2003 product CD, or, if you have installed or upgraded Windows Server 2003 using the Windows Server 2003 with Service Pack 2 (SP2) CD, insert that CD instead. If you prefer to install from a folder, choose the folder to which you copied the Windows Server 2003 CD or the Windows Server 2003 with SP2 CD.